KR20160042026A - Clamping claw for attaching to a slide rail of an operating table - Google Patents

Abstract

The invention relates to a clamping claw (10) for attachment on a sliding rail (12) of a surgical table. The clamping claw according to the present invention comprises a base body 38, a clamping structure 42, 44, 56, 74, 84, 88 attached to the base body 38, at least one And a clamping structure (42, 44, 56, 74, 84, 88) operatively connected to the clamping structure (42, 44, 56, 74, 84, 88) 74, 84, 88 can be moved in a locked state in which the contact elements 42, 44, 56 of the clamping structures 42, 44, 56, 74, 84, 88 contact the sliding rail 12, Respectively. In the locked state of the clamping structures 42, 44, 56, 74, 84 and 88, the contact elements 42, 44 and 56 are arranged in such a way that the two rail surfaces 14, , 16, 18) on at least one edge region (24, 28) of the sliding rail (12). The contact elements 42,44 and 56 may have edge recesses 54 and 72 disposed between the two contact surfaces 50,52 and 68,70 and the contact surfaces 50,52,68 and 70, One of the two contact surfaces 50, 52, 68, 79 is in the locked state of the clamping structures 42, 44, 56, 74, 84, 88 and the two rail surfaces 14, 16, 18 And the other contact surface is in contact with the other rail surface and accommodates the rail edges 22, 26 without contact.

Description

CLAMPING CLAW FOR ATTACHING TO A SLIDE RAIL OF AN OPERATING TABLE -

The invention relates to a clamping claw for mounting on a sliding rail of a surgical table according to the heading of claim 1.

The operating tables mainly have so-called sliding rails along opposite sides of their table segments, which have a rectangular cross-section and serve to fix accessories such as support aids in a desired position on the operating table, the clamping claws being coupled with a particular accessory Which is mounted on the sliding rail.

In the simplest designs, this clamping claw is formed as a clamp-like part that is shoved onto the sliding rail and secured in position by the clamping screw. The modified designs also enable the clamping claws to be swiveled to any desired location on the sliding rails and thus can be fastened to the sliding rails more quickly without the need for access from one end of the sliding rails.

Known embodiments of such clamping claws, also known as clamping blocks, are characterized in that the hook-shaped structure reaches across the upper end of the sliding rail with a rectangular cross-section. In this process, the inner flank of the clamping claw, which tapers at an acute angle, sustains the two upper longitudinal edges of the sliding rail running parallel to each other. The gravity of the clamping claw, which generally engages with the outside of the operating table, rotates the latter until the side flank supports the upright outer surface of the sliding rail. For example, a clamping element moved through a tommy screw will in turn hold the lower inner edge of the sliding rail with the slanting surface and secure the clamping claw after prestressing is applied (secure). The transfer of force from the clamping claws to the sliding rails occurs almost entirely through the edges of the sliding rails. Thus, depending on the design of the edge fillet, it results in different results and firstly results in large surface pressures which greatly limit the force absorbing capability of the clamping claw. The connection between the clamping claw and the sliding rail also appears soft and compliant since high load concentration can result in local deformation of the edges. Also, the tolerances of the spacing dimensions and the edge fillets will increase at the diagonal lines of the rectangular cross section. These tolerances must be compensated by the clamping element.

In handling, fast clamping systems, which must occur by a single actuation, are desirable if mounting and compressive stressing of the clamping element is possible. This is made difficult by the large travel required of the clamping elements.

The problems described above become more serious in that the sliding rails in use are different from each other in their dimensions and fillets. Hitherto, therefore, it has been difficult to provide a clamping claw that allows simple and precise mounting of accessories on a surgical table, regardless of the particular sliding rail used.

The problem to be solved by the present invention is to show a clamping claw which allows a simple and stable mounting of the accessory on the operating table regardless of the particular sliding rail used.

The present invention solves this problem by a clamping claw having the features of claim 1. Advantageous modifications are indicated in the dependent claims.

The clamping claw according to the present invention has a base body and a clamping structure disposed on the base body, having at least one bearing element designed to bear against the sliding rail. Using a actuating element operatively connected to the clamping structure, the clamping structure can be moved to a locked state in which the bearing elements of the clamping structure support the sliding rails. In the locked state of the clamping structure, the bearing elements engage at least one edge region of the sliding rail where the rail edges are positioned between two rail surfaces inclined relative to one another at generally right angles. The present invention now requires a bearing element with an edge recess disposed between the two contact surfaces and the contact surfaces and the bearing element receives the rail edge in the locked state of the clamping structure without contact Wherein one of the two contact surfaces carries one of the two rail surfaces and the other contact surface carries the remaining rail surface.

The edge recesses according to the invention ensure that the bearing elements only engage with the edge areas of the sliding rails which only flush, i.e. the rail surfaces are in contact with the bearing elements in the edge areas, . As a result, the fillet of the rail edge has no effect on the clamping force which allows the clamping claw to be fixed on the sliding rail. In particular, there is no need to allow for the tolerances associated with the edge fillets for a particular sliding rail used when designing the clamping claw.

The clamping claw can be placed on the sliding rail and has the advantage that it can only be locked with one hand. Therefore, handling is particularly easy.

Preferably, the clamping structure is tightened by actuating the actuating element against the surface of the sliding rail operatively connected to the moveably mounted clamping block-actuating element and not affected by the bearing element With a clamping surface that can be removed. Assuming a rectangular profile of the sliding rails positioned upright, in this preferred embodiment the first bearing element will engage the upper and the inner sides of the rectangle (without the corresponding rail edge) and the second bearing element The clamping surface of the clamping block will be tightened against the outer side of the rectangle for locking of the clamping structure. In this way, the clamping claw is clamped particularly stably against the sliding rail.

Preferably, the clamping structure has a clamping surface of the clamping block against a surface of the sliding rail that is not affected by the bearing element when the cam-actuating element coupled with the actuating element is actuated. The use of the cam makes it possible, for example, to clamp the clamping surface of the clamping block against the sliding rail in a particularly simple manner, which is constructed on the rotating shaft coupled with the actuating element.

In one advantageous embodiment, the clamping block is provided with a clamping surface, which is formed from a pressing piece operatively connected to the operating element and the bearing shoe, and which is mounted to be pivotable on the pressing piece. The two-part swiveling design of the clamping block ensures stable clamping of the clamping block to the sliding rail in the locked state. That is, when a force is exerted on the clamping block, this force, acting in the direction of the length of the sliding rail, will become equal to that absorbed in that the bearing shoe and pressing piece swivel relative to each other. On the other hand, the bearing shoe and the pressing piece are rigidly engaged and, in the locked state, the clamping claw will move along the sliding rail as the force overcomes the frictional resistance between the sliding rail and the bearing shoe.

The above-described embodiment is advantageously modified in that the clamping surface of the bearing shoe is formed from two arcuate surface segments that are in contact with the center, planar surface segment, and planar surface segments at the sides. The surface segments are oriented in the direction of the length of the sliding rail, that is, the first arcuate surface segment in the direction of the length of the sliding rail follows a center, planar surface segment, which is followed by a second arcuate surface segment. Depending on the swivel position of the bearing shoe relative to the pressing piece, one of the center, planar surface segment or two-arcuate surface segments is placed against the sliding rail.

Preferably, the bearing shoe is held by a spring-loaded detent element at a predetermined swivel position. The detent element may be formed from one or more spring-loaded balls. If the bearing shoe is swivelable with respect to the vertical axis, the predetermined swivel position at which the detent element fixes the bearing shoe is such that, for example, the intermediate shoe from the intermediate position to the intermediate position is against the force of the compressive stress exerted by the detent element. And may be deflected downward on any side along a sliding rail running horizontally.

In one alternate embodiment, the clamping block is a single piece and has a bearing surface - a concave shape that faces away from its clamping surface - a cam having a convex shape corresponding to the concave shape of the bearing surface, Lt; RTI ID = 0.0 > a < / RTI >

In this embodiment also, the clamping surface of the clamping block is preferably formed from two arcuate surface segments which are in contact with the central, planar surface segment and the planar surface segment at the sides.

Preferably, the clamping block is disposed in the seat formed in the base body with its end facing away from the clamping surface and is provided with at least two concave bearing surfaces - at least two adjacent portions formed in the seat, ) -. Due to the mounting of the clamping block in the seat formed in this type of base body, the mobility of the clamping block is limited in a desired manner.

Advantageously, a yoke spring is provided which lies within the recess formed in the clamping surface of the clamping block. The yoke spring serves to close the chain of force against the shaft carrying the cam. It also has the function of directing the clamping block at the desired position in the unloaded state.

Preferably, at least two bearing elements are provided which, in the locked state of the clamping structure, engage with the different edge regions of the sliding rail in the manner of the present invention, i.e. by fastening each of the rail edges by means of these edge recesses They will be received within the edge recesses without contact. For example, the clamping claw may have two pairs of bearing elements, one of which engages the lower edge region and the other of which engages the upper edge region of the sliding rail.

Advantageously, the at least one bearing element comprises two convex arcuate surfaces mounted pivotally on one end in the swivel bar-base body and, at its free end, forming contact surfaces. The convex shape of the contact surfaces ensures that each of the rail edges themselves is recessed, that is, does not have contact with each of the bearing elements, while bearing elements only have line contact with the rail surfaces co-ordinated with them do. In this way, locking of the clamping claws on a particularly reliable sliding rail is achieved.

Other preferred embodiments of the present invention will become apparent from the following description.

The invention will be described more closely with the aid of the following figures:
1, a perspective view of a clamping claw according to the invention;
Figure 2 is a side cross-sectional view of a clamping claw mounted on a sliding rail;
Figure 3, a perspective view of the base body of the clamping claw;
Figure 4 is a side view of parts of a clamping claw for indicating how the swash cam according to the invention engages with the sliding rail;
Figure 5 is a side view of parts of a clamping claw for indicating how a swivel bar according to the present invention engages with a sliding rail;
Figure 6, a perspective view particularly illustrating the clamping block according to the first embodiment;
Fig. 7 is a partial sectional top view of the clamping block according to the first embodiment in particular; Fig.
Figure 8, a perspective view particularly illustrating the clamping block according to the second embodiment;
9, another perspective view particularly illustrating the clamping block according to the second embodiment;
10, a perspective view showing a clamping block according to a second standing example;
Figure 11, a side view showing the sliding rail and the clamping claw in the open position;
Figure 12, a side view showing the sliding rail and the clamping claw in a stable base position;
13 is a side view showing the sliding rail and the clamping claw in the locked position;

Figures 1 and 2 show a clamping claw 10, which serves to mount the accessory on the sliding rail 12 of the operating table, not shown, in perspective and side sectional views. As also shown in Figures 4 and 5, the sliding rail 12 has a rectangular cross-section. The sliding rail 12 thus has an upper rail surface 14 and a lower rail surface 16 parallel to it and also has an inner rail surface 18 and an outer rail surface 20 ). Between the upper rail surface 14 and the inner rail surface 18 there is a rail edge 22 extending in the direction of the length of the sliding rail 12 i.e. perpendicular to the plane of the representation of figure 2 exist. The areas of the upper rail surface 14 and the inner rail surface 18 that directly contact each other with this rail edge 22 are designated together as an edge region 24 as follows. The same can be applied to the edge areas designated as 28, 32 and 36, cooperating with the rail edges designated as 26, 30 and 34 in Figs. 4 and 5.

The clamping claw 10 has an essentially hook-shaped base body 38, shown independently in Fig. Two swash cams 42, 42 mounted on the pivot, above the sliding rail 12 on top, when the clamping claw 10 is mounted, in the upper section 40 of the base body 38, 44). The two swash cams 42, 44 are oriented parallel to the longitudinal axis of the sliding rail 12 with respect to each other. Since the two swash cams 42 and 44 are constructed identically, only the swash cam 42 shown in Figs. 2 and 4 will be described in detail.

2, the swash cam 42 is pivotally mounted relative to the pin 48 in the cam area designated as 46 and is rigidly mounted to the base body 12. The mounted cam area 46 of the swash cam 42 has a curved outer surface that rests against a corresponding concave curved abutment located on the interior side of the base body 38 . The swash cam 42 also has two concave arcuate contact surfaces 50 and 52 on its free end, i.e., the unattached side, and a concave edge 50, And has a concave portion 54.

When the clamping claw 10 is placed on the sliding rail 12, the two contact surfaces 50, 52 of the swash cam 42 are engaged with the upper rail surface 14 and the inner rail surface 18, Respectively, and the rail edge 22 is taken up within the edge recess 54 without contact. The swash cam 42 therefore encloses the sliding rail 12 within the edge region 24 and therefore the rail edge 22 is recessed so that it does not have contact with the swash cam 42. Bearing on the sliding rail 12 only occurs through the two contact surfaces 50 and 52 of the swash cam 42 and each of them is supported by the upper rail surface 14 and the inner rail surface 18 To make line contact. This line contact is indicated by the arrows in the side view of Figure 2 and is indicated by the points on the contact surfaces 50, 52 in the side view of Figure 4 and the points on the rail surfaces 14, 18 in the edge region 24 .

The swash cam 42 therefore forms the bearing element according to the invention and only the upper rail surface 14 and the inner rail surface 18 of the sliding rail 12 are used for channeling the load While the rail edge 22 itself remains unloaded. The same thing can of course be applied to other swash cams 44 as well.

Another bearing element according to the present invention is formed by a swivel bar 56 mounted by one end 58 to swing against a pin 60 which is rigidly mounted within the base body 38. Two contact areas 64 and 66 spaced apart from one another in the direction of the length of the sliding rail 12 at the free end 62 of the swivel bar 56 located opposite the mounted end 58, Lt; / RTI > The contact areas 64 and 66 are constructed identically and therefore only the contact area 42 shown in Figs. 2 and 5 will be described below.

In the contact area 64, two convex arcuate contact surfaces 68 and 70 are formed, with a convex shaped edge recess 72 positioned therebetween. In the locked state, two contact surfaces 68 and 70 are placed in the edge region 28 against the lower rail surface 16 and the inner rail surface 18. On the other hand, the rail edge 26 is taken up in the edge concave portion 72 without contact. The bearing of the two contact surfaces 68 and 70 is also caused by a line contact with the swash cams 42 and 44. As a result, the line contact is shown by the arrows in Fig. 2 and the points in Fig.

 2, the swivel bar 56 is pretensioned by a compression spring 74 so that the abutment surface 68 of the swivel bar 56 is displaced upwardly against the lower rail surface 16, . The compression spring 74 is clamped between a shoulder 76 formed on the swivel bar 56 and a peg 78 formed on the base body 38. There are two control levers 80 and 82 at the mounted end 58 of the swivel bar 56.

In addition, the cam 84 is swivel mounted within the base body 38 of the clamping claw 10. The cam 84 is coupled to one actuating lever 86 and is configured to engage the swash cams 42, 44 in a manner to be described in greater detail below in order to secure the clamping claw 10 against the sliding rail 12. [ And against the outer rail surface 20, which is not affected by the swivel bar 56 and the swivel bar 56. The cam 84 also affects the movement of the swivel bar 56. For example, as shown in Figures 11 and 13, two control lobes 90 and 92 are formed in the cam 84 and interact with the control levers 80 and 82 of the swivel bar 56.

Figures 6 and 7 show a first embodiment of the clamping block 88. In this first embodiment, the clamping block 88 is formed from the pressing piece 94 and the bearing shoe 96. The bearing shoe 96 is mounted on the pressing piece 94 and becomes swivelable with respect to the vertical axis 98. The spring-loaded detent element 100, formed from one or more balls 104 acted upon by the compression spring 102 and the compression spring 102 in this embodiment, And serves to fix the bearing shoe 96 at the center base position, as shown in FIG. The bearing shoe 96 includes a central, planar surface segment 108 and a planar surface segment 108 arched away from the sliding rail 12 (left and right in Figure 7) And has a clamping surface 106 that is formed from the two surface segments 110 and 112 and that faces the sliding rail 12.

When the operating lever 86 is swiveled downward relative to FIG. 6, the cam 84 coupled with the operating lever 86 pushes the pressing piece 94 in the direction of the sliding rail 12. In this way, the bearing shoe 96, which is swivel-connected to the pressing piece 94, presses against the outer rail surface 20 of the sliding rail 12.

The two-part design described above of the clamping block 88 allows the clamping claw 10 to be stably clamped on the sliding rail 12 without slipping in the direction of the length of the sliding rail 12 . 7) from the intermediate base position (see FIG. 7) by the swiveling connection between the bearing shoe 96 and the pressing piece 94, the shape of the clamping surface 106 of the bearing shoe 96, A swivel is achieved. On the other hand, if the bearing shoe 96 and the pressing piece 94 are firmly coupled together, when the force acting on the clamping claw 10 overcomes the frictional resistance between the sliding rail 12 and the bearing shoe 96 The sliding rail 12 bearing the clamping surface 106 with a certain pretension will move in the direction of its length.

Figs. 8, 9 and 10 show a second embodiment of the clamping block 88. Fig. The second embodiment is characterized in that the clamping block 88 is fashioned as a single piece. The clamping surface 106 of the clamping block 88 extends from the two arcuate surface segments 110 and 112 in contact with the central surface segment 108 in the central surface segment 108 and sides, As shown in FIG. The one-piece clamping block 88 according to Figure 10 has a bearing surface 114 which is formed as a concave spherical surface in this embodiment, facing away from its clamping surface 106 . On the cam 84 in this embodiment, a corresponding convex spherical pressing surface 116 is provided, as shown in Fig. With this arrangement, the clamping block 88 is movable with respect to a horizontal axis lying parallel to the longitudinal axis and to a vertical axis perpendicular thereto.

The clamping block 88 is disposed with its end facing away from the clamping surface 106 in the seat 118 formed in the base body 38, as shown in Fig. The clamping block 88 includes two convexly shaped bearing surfaces 120 and 122 formed on the end of the clamping block facing away from the clamping surface 106, 126 are placed against the abutments located in the seat 118 so as to bear with two convexly shaped bearing surfaces 124, 126 formed below the end of the clamping block 88 facing away from the bearing surface 106. Of the four adjacencies that cooperate with the four bearing surfaces 120, 122, 124, 126, only two upper abutments are shown in FIG. 9 and are designated there as 128 and 130. The contact of the bearing surfaces 120, 122, 124, 126 and the corresponding adjacent portions 128, 130 causes the clamping block 88 Is prevented from rotating. In addition, displacement along the sliding rail 12 is also prevented.

The clamping claw 10 also has a yoke spring 132, formed by two yoke ends to the base body 38. The two yoke ends are joined together by a yoke segment 134, which lies within the recess 136 formed in the clamping surface 106 of the clamping block 88. The yoke spring 132 has a function of forming a closure force together with the cam 84. It also functions for intermediate alignment of the clamping block 88 in the unloaded state.

The function of this second embodiment of the clamping block 88 corresponds to that of the first embodiment. In the second embodiment also the clamping block 88 is oriented by rotation about the cam 84 on the outer rail surface 20 when the clamping block 88 approaches and is clamped on the rail surface 20. [ . When loaded in the direction of the length of the sliding rail 12, the clamping block 88 can swivel relative to the vertical axis and thus achieve the desired clamping. The forces of the resulting shaft are channeled from the clamping block 88 to the base body 38 of the clamping claw 10 by the bearing surfaces 120, 122, 124 and 126.

11, 12 and 13, how the clamping claw 10 is mounted on the sliding rail 12 and locked therein will be described below.

To mount the clamping claw 10, the operating lever is located in the vertical position, as shown in Fig. In this lever position, the cam 84, coupled with the actuating lever 86, is not engaged with the swivel bar 56. Thus, the clamping claw 10 is positioned on the sliding rail 12 and swiveled there. Swash cams 42 and 44-only the swash cam 44 is shown in Figures 11, 12 and 13-lies against the edge region 24 of the sliding rail 12 and the clamping claws 12 Swivels around the upper inner rail edge 22 with its upper segment until the base body 38 is halted on the outer rail surface 20. [

The swivel bar 56, which is loaded by the compression spring 74 and shown in the unlocked cam position shown in Fig. 12, slides past the rail surface 16 and is snap-in at the inner rail surface 18 snap in. The compression spring 74 presses the swivel bar 56 with the contact surface 68 against the lower rail surface 16 and the other contact surface 70 of the swivel bar 56 is still in the unloaded state And does not have contact with the rail surface 18. The swivel out of the clamping claw 10, as opposed to this swivel in the movement, however, can be prevented by the swiveling of the contact surface 70 of the swivel bar 56 against the inner rail surface 18 in this case It is no longer possible because it is prevented by support. Thus, the clamping claw 10 is already stabilized against dropping off, but still freely movable on the sliding rail. The state shown in Fig. 12 can thus be referred to as a stable base position.

Fig. 13 shows the locked state of the clamping claw 10, from which the actuating lever 86 is swiveled downwards, starting from the stable base position of Fig. By the swivel of the operating lever 86, the cam 84 approaches the outer rail surface 20. The control lobe 90 cooperating with the corresponding control lever 80 of the swivel bar 56 is configured such that the swivel bar 56 in the closed condition releases the sliding rail 12 by the action of external forces , Preventing it from being positioned in the open position.

The clamping block 88 can sway in a narrow range with respect to the longitudinal axis of the cam 84 and straightens out the outer rail surface 20, upon. The force transmitted by the outer rail surface 20 passes through the contact surface 70 at the inner rail surface 18 and through the contact surface 50 of the swash cam 44 or 42 below the clamping claw 10, Back to the base body 38 of FIG. The transmission of force through the contact surface 52 is prevented by the swash cam 42 being braced by the lobe area 46 rounded against the base body 38 of the clamping claw 10. [ The rotation of the swash cam 42 is realized until the contact surface 50 supports the upper rail surface 14 and the rotation of the swash cam 42 is transmitted to the bearing To the surfaces 138 and 140 in the vertical direction. Thus, the sliding rails 12 starting from the horizontal closing movement are clamped horizontally and vertically.

11 shows the open position of the clamping claw 10, in which the actuating lever 86 is swiveled upwards. When the actuating lever 86 is swiveled upwards the control lobe 92 of the cam 84 runs against the control lever 82 of the swivel bar 56, Is pressed downward against the force of prestressing exerted by the spring (74). This releases the sliding rail 12, and thus the clamping claw 10 can be swiveled out.

A spontaneous snap back (e.g., due to vibration or unintentional actuation) from the lock position shown in Figure 13 to the base position shown in Figure 12 is formed on the actuation lever 86 and a spring- Which is engaged by a series of counter-teeth 146 on the base body 38 by a lug 144 that is secured to the base body 38. By actuating only the locking lever 142, it is possible to switch the cam 84 to the unlocked (but secured) base position of Fig.

As previously described, the clamping claw 10 according to the present invention is clamped on the sliding rail 12 only by the rail surfaces 14, 16, 18 and 20, but the rail edges 22, 26, 30 and 34 This is not the case. Thus, the cam 84 only has to compensate for the dimensional tolerances of the sliding rail 12 in the horizontal and vertical directions, and not for the different edge fillets. In this way, the eccentricity of the cam 84 can be kept small.

Due to the high leverage ratio between the operating lever 86 and the cam 84, large normal forces can be exerted on the sliding rail 12.

10 Clamping claws
12 sliding rails
14 Top rail surface
16 Lower rail surface
18 Inner rail surface
20 outer rail surface
22, 26, 30, 34 rail edges
24, 28, 32, and 36 edge regions
38 base body
40 upper section
42, 44 Swash cams
46 cam area
48 pins
50, 52 contact surfaces
54 edge concave portion
56 Swivel Bar
58 Mounted End
60 pin
62 free end
64, 66 contact areas
68, 70 contact surfaces
72 edge concave portion
74 compression spring
76 Shoulder
78 pegs
80, 82 control lever
84 Cam
86 Operation lever
88 Clamping block
90, 92 control lobes
94 pressing piece
96 Bearing Shoe
98 vertical axis
100 Spring-loaded detent element
102 compression spring
104 Balls
106 Clamping surface
108 Center Surface Segment
110, 112 arcuate side segments
114 Bearing surface
116 Pressing surface
118 sheet
100, 122, 124, 126 Bearing surfaces
128, 130 adjacent portions
132 yoke spring
134 yoke segment
136 concave portion
138, 140 Support surfaces
142 Lock lever
144 lugs
146 Counter sprockets

Claims (15)

A clamping claw (10) for mounting on a sliding rail (12) of a surgical table,
The base body 38,
Clamping structure 42, 44, 56, 74, 84, 88 disposed on the base body 38 at least one bearing element 42, 44, 56) - and
A working element 86 operatively connected to the clamping structure 42, 44, 56, 74, 84, 88 such that the clamping structure 42, 44, 56, 74, 84, The bearing elements 42, 44 and 56 of the first and second sliding elements 42, 44, 56, 74, 84 and 88 can be shifted to a locking state for supporting the sliding rail 12,
Lt; / RTI &
In the locked state of the clamping structure 42, 44, 56, 74, 84, 88, the bearing elements 42, 44, 56 are arranged such that the rail edges 22, 26 are inclined 2 (24, 28) of the sliding rail (12) positioned between the two rail surfaces (14, 16, 18)
The bearing element 42, 44, 56 includes two contact surfaces 50, 52, 68, 70 and an edge recess 54, 72 disposed between the contact surfaces 54, (22, 26) in said locked state of said clamping structure (42, 44, 56, 74, 84, 88) without contact and wherein said two contact surfaces (50, 68, 70) supports one of the two rail surfaces (14, 16, 18) and the other contact surface carries a remaining rail surface. The method according to claim 1,
The clamping structure 42, 44, 56, 74, 84, 88 includes a moveably mounted clamping block 88 operatively connected to the actuating element 86, Having a clamping surface 106 which can be tightened by actuating the actuating element 86 against the surface 20 of the sliding rail 12 which is not affected by the movement of the sliding rail 12. [ Features a clamping claw. 3. The method of claim 2,
The clamping structure 42, 44, 56, 74, 84, 88 includes a cam 84 coupled with the actuating element 86 and mounted within the base body 38, when the actuating element 86 is actuated Pressing the clamping surface (106) of the clamping block against a surface (20) of the sliding rail (12) unaffected by the bearing elements (42, 44, 56) Clamping claw. The method according to claim 2 or 3,
The clamping block 88 is formed from a pressing piece 94 operatively connected to the actuating element 86 and the bearing shoe 96 and is capable of pivoting on the pressing piece 94 , Characterized in that the clamping surface (106) is provided. 5. The method of claim 4,
Characterized in that the bearing shoe (96) is held by a spring-loaded detent element (100) at a predetermined swivel position. The method of claim 3,
The clamping block 88 is a single piece and has a bearing surface 114 - a concave shape that faces away from its clamping surface 106 and has a recessed shape in the bearing surface 114 Contacting with a pressing surface (116) formed on said cam (84) with a corresponding convex shape. The method according to claim 6,
The clamping block 88 is disposed within the seat 118 formed in the base body 38 with its end facing away from the clamping surface 106 and includes at least two concave bearing surfaces 120, , 126) lying against at least two abutments formed in the seat (118). 8. The method of claim 7,
Characterized by a yoke spring (132) lying within a recess (136) formed in the clamping surface (106) of the clamping block (88). 9. The method according to any one of claims 2 to 8,
The clamping surface 106 of the clamping block 88 includes a central, planar surface segment 108 and two arched surface segments 110, 112 that are in contact with the planar surface segment 108 at sides. 112). ≪ / RTI > 10. The method according to any one of claims 1 to 9,
Characterized in that said at least one bearing element has at least two bearing elements (42, 44, 56) for engagement with different edge regions (24, 28) of said sliding rail (12). 11. The method according to any one of claims 1 to 10,
The at least one bearing element comprises a swivel bar 56 which is pivotally mounted at one end 58 in the base body 38 and at its free end 62 is provided with two convex ) Arcuate surfaces (68, 70). 12. The method of claim 11,
The clamping structure (42, 44, 56, 74, 84, 88) comprises a prestressing element (74), at least one of the two contact surfaces (68, 70) of the swivel bar Characterized in that it has a prestressing compressive stress on the swivel bar (56) at a swivel position that rests against the cooperating rail surface (26). 13. The method according to claim 11 or 12,
The swivel bar 56 is supported at its swiveled end 56 by bar surfaces 80 and 82-control lobes 90 and 92 fashioned on the cam 84 in the locked state The clamping claws being located opposite to each other. 14. The method according to any one of claims 1 to 13,
The actuating element includes a swivel lever 86 having a locking lug 144 that engages a toothing 146 fashioned on the base body 38 in a releasable manner in the locked state. ). ≪ / RTI > 15. The method according to any one of claims 1 to 14,
The at least one bearing element includes a swash cam (52) mounted swivelably on the base body (38) with two convex arcuate surfaces (50, 52) forming the contact surfaces 42, 44). ≪ / RTI >

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